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Propagation dynamics of a spatiotemporal vortex pulse in the spatial fractional system
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作者 jinqi song FENGQI LIU +7 位作者 MINGLI SUN XIANGYU TONG NAICHEN ZHANG BINGsong CAO WENZHE WANG KAIKAI HUANG XIAN ZHANG XUANHUI LU 《Photonics Research》 SCIE EI CAS CSCD 2024年第9期2027-2032,共6页
The dynamics of wave packets carrying a spatiotemporal vortex in the spatial fractional system is still an open problem.The difficulty stems from the fact that the fractional Laplacian derivative is essentially a nonl... The dynamics of wave packets carrying a spatiotemporal vortex in the spatial fractional system is still an open problem.The difficulty stems from the fact that the fractional Laplacian derivative is essentially a nonlocal operator,and the vortex is space-time coupled.Here,we investigate the transmission of spatiotemporal vortices in the spatial fractional wave equation(FWE)and demonstrate the effects of linewidth,vortex topological charge,and linear chirp modulation on the transmission of Bessel-type spatiotemporal vortex pulses(BSTVPs).Under narrowband conditions,we find that the propagation of BSTVP in the FWE can be seen as the coherent superposition of two linearly shifted half-BSTVPs and can reveal orbital angular momentum backflow for the half-BSTVP.Our analysis can be extended to other spatiotemporal vortex pulses. 展开更多
关键词 VORTEX FRACTIONAL SYSTEM
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